Chemistry prize winners

These are the 2001 Nobel Prize winners in chemistry, from left: William S. Knowles, of St. Louis, Mo.; Ryoji Noyori of Nagoya University in Japan and K. Barry Sharpless of the Scripps Research Institute in La Jolla, Calif.

These are the 2001 Nobel Prize winners in chemistry, from left: William S. Knowles, of St. Louis, Mo.; Ryoji Noyori of Nagoya University in Japan and K. Barry Sharpless of the Scripps Research Institute in La Jolla, Calif. (AP/Pressens Bild)

These are the 2001 Nobel Prize winners in chemistry, from left: William S. Knowles, of St. Louis, Mo.; Ryoji Noyori of Nagoya University in Japan and K. Barry Sharpless of the Scripps Research Institute in La Jolla, Calif.AP/Pressens Bild